Volcanic eruption.

Professor Bill McCormick, Mary Guido, director Ben Disaster Research Center Field of University College London and is a member of the Working education disaster, British Prime Minister Tony Blair. Talk about that. "On average, every 50,000 years, the world would be a massive volcanic eruption which sent volcanic ash ejected will cover approximately 1,000 square kilometers. Adjacent continents. Are filled with ashes. And sulfur are. Rise into the atmosphere. Sulfuric acid is a veil covering the light around the sun can not shine down upon the earth. Lunch will look no different from Twelfth Night. Chat damage major volcanic eruption in human history, the volcano Toba in Sumatra, Indonesia on 74,000 years ago due to an explosion close to the equator, the gas spread to the northern hemisphere and south quickly when studying ice cores indicate that event that resulted in a sudden drop in temperature after 5-6 years. By the Tropical region are cold as ice. "The opportunity to be a major volcanic eruption is possible over a large meteor hit Earth 12 times, but the possibility that it will happen in the lifespan of the current is only 0.15% of the property is to be policed. The area had been an explosion in the past, such as occurs in the U.S. and the Manitoba area. Another concern over the world. Potential volcanic eruption of violence in areas that had never happened before. Such as the Amazon rain forest. "